EP 2536767 B1 20150506 - METHODS FOR OPERATING A POLYMERIZATION REACTOR
Title (en)
METHODS FOR OPERATING A POLYMERIZATION REACTOR
Title (de)
BETRIEBSVERFAHREN FÜR EINEN POLYMERISIERUNGSREAKTOR
Title (fr)
PROCÉDÉS D'EXPLOITATION D'UN RÉACTEUR DE POLYMÉRISATION
Publication
Application
Priority
- US 30562310 P 20100218
- US 2011025231 W 20110217
Abstract (en)
[origin: WO2011103280A1] Methods for shutting down and restarting polymerization in a gas phase polymerization reactor are provided. The method can include introducing a polymerization neutralizer to the reactor in an amount sufficient to stop polymerization therein. The method can also include stopping recovery of a polymer product from the reactor and stopping introduction of a catalyst feed and a reactor feed to the reactor. The method can also include adjusting a pressure within the reactor from an operating pressure to an idling pressure. The method can also include adjusting a superficial velocity of a cycle fluid through the reactor from an operating superficial velocity to an idling superficial velocity. The method can also include maintaining the reactor in an idled state for a period of time.
IPC 8 full level
C08F 10/00 (2006.01); C08F 2/34 (2006.01); C08F 2/42 (2006.01)
CPC (source: EP US)
C08F 10/00 (2013.01 - EP US); C08F 4/6592 (2013.01 - EP US); C08F 210/16 (2013.01 - EP US)
C-Set (source: EP US)
Citation (examination)
WO 9830599 A1 19980716 - EASTMAN CHEM CO [US]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2011103280 A1 20110825; BR 112012020762 A2 20160503; BR 112012020762 B1 20200407; CN 102803308 A 20121128; CN 102803308 B 20150401; EP 2536767 A1 20121226; EP 2536767 B1 20150506; ES 2543635 T3 20150820; MY 159256 A 20161230; RU 2012139650 A 20140327; RU 2554881 C2 20150627; US 2012329962 A1 20121227; US 8598283 B2 20131203
DOCDB simple family (application)
US 2011025231 W 20110217; BR 112012020762 A 20110217; CN 201180010186 A 20110217; EP 11705413 A 20110217; ES 11705413 T 20110217; MY PI2012003719 A 20110217; RU 2012139650 A 20110217; US 201113575872 A 20110217